Signal Diagnosis on Display: SIGNAL SIGNIFICATION REQUIRE OPERATION No signal on display, and the power of spa is off Do not use the control panel before the power is on. The setting will be reserved until the next power supply comes. - - Unknown on Temperature Will show the current temperature after the pump work for 2 minutes. 0HH “Over-heated”-Spa is shut down .*one sensor has tested out the temperature by heater at 118°F/47.8℃ Do not input any water. Remove the cover and cool the water. Then press any key to restore the SPA. Please cut off the power supply and contact your distributor or service group if the SPA could not be restored. 0H5 “Over-heated”-Spa is shut down .*one sensor has tested out the temperature by heater at 110°F /43.5℃. Do not input any water. Remove the cover and cool the water. When the temperature reaches 107°/41.7°,the spa will be restored automatically. Please cut off the power supply and contact your distributor or service group if the SPA could not be restored. 5nA Spa is shut down. *The “A” Jack in the sensor is not working. If the problem still exists, please contact your distributor or service group (This might temporarily appear when over-heating. 5nb Spa is shut down. *The “B” Jack in the sensor is not working. If the problem still exists, please contact your distributor or service group (This might temporarily appear when over-heating. 5n5 Unsteadiness on sensor. If this show up interactively with the temperature, it might be the temporary status. If it flashes, Spa is shut down.* If the problem still exists, please contact your distributor or service group. HFL Detected that there exists noticeable differences on temperature sense. There exists the water flowing problem. If the water level is normal, please assure all the pumps are working. If the problem still exists, please contact your distributor or service group. LF Continuous low flowing problem. (The fifth time within 24 hours for “HFL” signal) The heater is shut down, but other functions on SPA keep running. The operation for this “HFL” signal. The heating will not be restored automatically, press any key to make it restore. dr There might exist the problems of water shortage, bad water flow or air bubble etc. The Spa will stop for 15 minutes. If the water level is normal, please assure all the pumps are working. Press any key to make it restore. The SPA will be restored within 15 minutes. If the problem still exists, please contact your distributor or service group. dry Detected the water shortage on heater. (The third time for “dr” signal.)Spa is shut down.* The operation for this “dry” signal. The SPA will not be restored automatically, press any key to make it restore. 1CE Detected there exists some possible frozen status. Even the SPA is shut down, some equipment still requests to start for the anti-frozen protection. Not need any operation. No matter what status the SPA is, all the equipments will be automatically activated. When the sensor tests the temperature has reached 45°F/7.2℃ or higher, the equipments will keep working for 4 minutes. Probably it requests spare sensor to prevent exceptional frozen status. It is greatly recommended to use the spare anti-frozen sensor under much colder atmosphere, please contact your distributor for more detail information. For all reference if needed.